Background: Chemoradiotherapy-associated mucositis can manifest as
pain, inflammation, dysphagia, diarrhea, weight loss, rectal bleeding, and
infection. Mucositis is a major dose-limiting side effect of chemotherapy,
affecting nutritional intake and oral and intestinal function. Despite several
interventions being available, there is a need for safe and effective
preventative and treatment options for treatment-induced mucositis. The goals of
this review are to discuss interventions based on foods and natural products and
present the research to date. Methods: A narrative literature
review identified 60 clinical studies examining various nutritional compounds
and 20 examining probiotics. 9 studies on probiotics for the prevention of
diarrhea were also assessed on methodological quality and limitations
identified. Results: Several compounds have been posited as useful
adjuvants for cancer treatment–related mucositis. Probiotics demonstrate
efficacy for the prevention and treatment of chemoradiotherapy-induced
gastrointestinal toxicity without significant side effects. Glutamine and
activated charcoal were reported to reduce chemotherapy-induced diarrhea but not
radiation-induced intestinal mucositis. Honey has been reported to decrease
treatment interruptions, weight loss, and delays the onset of oral mucositis.
Zinc, glutamine, and topical vitamin E were demonstrated efficacy for oral
mucositis. Conclusion: There is plausible clinical evidence for the
administration of several adjunctive treatments for the prevention and treatment
of mucositis. Probiotics were reported to reduce the burden of intestinal
mucositis and treatment-induced diarrhea. Activated charcoal and glutamine are
beneficial for chemotherapy-induced diarrhea, whereas the administration of
honey, zinc, and glutamine reduce the risk of developing oral mucositis during
chemotherapy or radiotherapy.